Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
cong suat » nang suat, cong san
dang nhat » dung nhan, dung nha
luan dan » luan danh, luan van, luat dan
cong cua » cong cu, dong cua, huong cua
dan thi » dang thi, tran thi, dinh thi
cong ha » cong hoa, dong ha, cong tac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: cong trinh luan dan thi ((cong ha) or (((((cong suat) OR (cong cua))) or (dang nhat)))) luong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cong trinh luan dan thi ((cong ha) OR (((((cong suat) OR (cong cua))) OR (dang nhat)))) luong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh luan dan thi ((cong ha) or (((((cong suat) OR (cong cua))) or (dang nhat)))) luong".
• Adding a wildcard symbol may retrieve word variants: cong trinh luan dan thi ((cong ha) or (((((cong suat) OR (cong cua))) or (dang nhat)))) luong*.